WO2015060526A1

WO2015060526A1 - Case perforation device of energy storage device

Info

Publication number: WO2015060526A1
Application number: PCT/KR2014/007676
Authority: WO
Inventors: 이동열
Original assignee: 비나텍 주식회사
Priority date: 2013-10-23
Filing date: 2014-08-19
Publication date: 2015-04-30
Also published as: KR101525572B1; KR20150046849A

Abstract

The present invention relates to a case perforation device of an energy storage device, comprising: a case convey unit including a table body, a convey unit arranged on the table body and a case fixing unit coupled to the convey unit so as to be conveyed and fixing a case; and a perforation unit including a holder arranged on the inner surface of the case to be conveyed, a pin provided to the holder and driven in a direction from the inside surface of the case to the outside surface facing the inside surface so as to form a through hole in the case, and a pin operating part for operating the pin.

Description

Case perforation device of energy storage device

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a case perforation device of an energy storage device, and more particularly, to a through hole for discharging gas generated inside a case in a direction from an inner surface of the case of the energy storage device to an outer surface. It relates to a case perforation device.

Recently, supercapacitors have been developed as energy storage devices for systems that require a power supply, such as an electric vehicle, or a system for regulating or supplying an overload occurring instantaneously.

The supercapacitor includes a cell capable of collecting current and a metal case accommodating the cell.

Supercapacitors have various advantages, but when used for a long time, gas is gradually generated in a case over a long period of time, so that the internal pressure of the supercapacitor is greatly increased.

Since the casing surrounding the super capacitor is made of metal or hard plastic, the pressure inside the super capacitor is greatly increased when gas is continuously generated inside the casing.

In order to prevent the internal pressure from being increased by the gas generated inside the super capacitor, a through hole is formed in the case of the super capacitor.

In order to form a through hole in the case of the super capacitor, a through hole may be formed in a direction from the outer side of the plate toward the inner side by using a piercing press such as Korean Patent Publication No. 10-2004-0006097. Can be.

However, when the through-hole is formed in the direction from the outer surface of the case of the supercapacitor to the inner surface of the case using the press piercing device or the like, a burr is inevitably formed during the formation of the through hole in the inner surface of the case. Is formed.

When the burr is formed in a shape protruding from the inner surface of the case, the gas permeable membrane, which serves to cover only the through-hole portion of the inner surface of the case and selectively discharges only gas to the outside of the case, is easily torn and damaged by the burr or gas permeation A hole is formed in the membrane, and the electrolyte filled in the super capacitor flows out of the case, thereby shortening the lifespan.

Therefore, the present invention is to prevent the damage of the permeable membrane to cover the through hole by forming a burr on the inner surface of the case when forming a through hole for gas discharge in the case used for the super capacitor of the energy storage device Provide a case perforation device.

In one embodiment, the case perforation device of the energy storage device comprises a table body; A case transfer unit comprising a transfer unit disposed on the table body and a case fixing unit coupled to the transfer unit and fixed to the case; And a holder disposed on an inner side of the transferred case, a pin installed in the holder and driven in a direction from the inner side of the case toward the outer side facing the inner side to form a through hole in the case. And a drilling unit comprising a pin drive for actuating the pin.

The conveying unit of the case perforation device of the energy storage device includes a screw shaft formed in the axial direction of the case and a motor for rotating the screw shaft, wherein the case fixing unit includes a bushing portion fastened to the screw shaft; And an insertion unit coupled to the fixed body and inserted into the inner circumferential surface of the case.

The case fixing unit of the case puncturing device of the energy storage device includes a rotating motor for rotating the case.

The case perforation device of the energy storage device further includes a sensor for sensing the position of the case coupled to the case fixing unit and the rotation angle of the case by the rotary motor.

The case perforation device of the energy storage device further includes a control unit for controlling the case transfer unit and the perforation unit.

The diameter of the pin of the case perforation device of the energy storage device is 0.5 mm to 1.5 mm.

The pin driving unit of the case perforation device of the energy storage device includes a drive unit disposed on one side of the holder and driven in a direction toward the holder and a fixing unit disposed on the other side of the holder, the pin in conjunction with driving of the drive unit. It protrudes from this holder and protrudes from the inner side surface of the case toward the outer side surface.

A plurality of through holes of the case perforation device of the energy storage device are arranged in a matrix form.

In the case perforation device of the energy storage device according to the present invention, a burr is formed on the inner surface of the case by forming at least one through hole using an automated process in a direction from the inner surface of the case of the energy storage device to the outer surface. It is prevented from being formed to prevent damage to the gas permeable membrane covering the through hole on the inner surface of the case.

1 is a perspective view illustrating an energy storage device including a case punched by a case drilling device of an energy storage device according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view taken along the line II ′ of FIG. 1.

3 is a plan view of a case perforation device of the energy storage device according to an embodiment of the present invention.

Figure 4 is a perspective view of a case perforation device of the energy storage device according to an embodiment of the present invention.

5 is a perspective view illustrating the case fixing unit of FIG. 4.

6 is a front view of the drilling unit shown in FIG. 4.

FIG. 7 is a front view illustrating a through hole formed in the case body by the pin of FIG. 6.

In the following description, only parts necessary for understanding the embodiments of the present invention will be described, it should be noted that the description of other parts will be omitted so as not to distract from the gist of the present invention.

The terms or words used in the specification and claims described below should not be construed as being limited to the ordinary or dictionary meanings, and the inventors are appropriate to the concept of terms in order to explain their invention in the best way. It should be interpreted as meanings and concepts in accordance with the technical spirit of the present invention based on the principle that it can be defined. Therefore, the embodiments described in the present specification and the configuration shown in the drawings are only preferred embodiments of the present invention, and do not represent all of the technical idea of the present invention, and various equivalents may be substituted for them at the time of the present application. It should be understood that there may be variations and variations.

1 is a perspective view illustrating an energy storage device including a case punched by a case drilling device of an energy storage device according to an embodiment of the present invention. FIG. 2 is a cross-sectional view taken along the line II ′ of FIG. 1.

1 and 2, the energy storage device 10 includes a case 12 including a cell assembly and a gas passage membrane 19 (see FIG. 2).

The cell assembly has a configuration suitable for storing electrical energy. The cell assembly may include, for example, a core wound around a core, a core wound around the cell, and the cell may include a positive electrode, a negative electrode, a separator, and an electrolyte.

Although it is preferable that no gas such as hydrogen is generated from the cell assembly disposed inside the case 12, gas such as hydrogen may be gradually generated from the cell assembly due to the chemical action of the cell assembly.

The case 12 includes a case body 13 and

terminal plates

15 and 16.

The case body 13 is formed in a cylindrical shape with both ends opened, and the cell assembly is accommodated in the case body 13.

The material of the case body 13 may be made of metal such as aluminum, stainless steel, or tin-plated steel, or may be polyethylene (PE), polypropylene (PP), polyphenylene sulfide (PPS), polyetherether ketone (PEEK), or polytetrafluoroethylene (PTFE). Plastic material such as) may be used. In one embodiment of the invention the case body 13 is made of a metallic material.

The

terminal plates

15 and 16 are disposed at both ends of the opening of the case body 13, and the

terminal plates

15 and 16 seal the case body 13.

The

terminal plates

15 and 16 are firmly coupled to the case body 13 to prevent the electrolyte contained in the cell assembly from leaking to the outside or the outside air from flowing into the case 12.

When the case body 13 and the

terminal plates

15 and 16 are firmly bonded to each other and sealed to prevent external leakage of the electrolyte contained in the cell assembly, gas such as hydrogen generated from the cell assembly is removed from the case 12. It may not be discharged to the outside and this may increase the internal pressure of the case 12.

In order to prevent this, at least one, preferably a plurality of through holes 14 are formed in, for example, a matrix in the case body 13 of the case 12, and a plurality of through holes formed in the case body 13. 14 discharges gas, such as hydrogen, generated from the cell assembly disposed inside the case 12 to the outside of the case 12 to suppress or prevent the pressure inside the case 12 from increasing.

On the other hand, when the through-hole 14 is formed in the case body 13, a gas such as hydrogen generated inside the case 12 can be discharged to the outside of the case 12, but included in the cell assembly together with the gas. The electrolyte may leak through the through hole 14 to the outside of the case 12 to shorten the life of the energy storage device 10.

In order to selectively discharge only gas from the case 12 and to prevent the electrolyte contained in the cell assembly from being discharged to the outside of the case 12, a through hole of an inner side surface of the case body 13 is illustrated in FIG. 2. At the position corresponding to 14, the gas passage membrane 19 is covered.

The gas passage membrane 19 may be made of a plastic film that does not chemically react with the electrolyte of the cell assembly. The gas passage membrane 19 may be made of a material that selectively transmits gas and does not permeate the electrolyte of the cell assembly. .

The gas passage membrane 19 is made of one of fluorine resin, polyethylene terephthalate (PET), polyvinylidene chloride (PVDC), polypropylene (PE), polyphenylene sulfate (PPS), polyether ether ketone (PEEK), and polyimide (PI). Plastic films made of can be used.

An adhesive layer for attaching the gas passage membrane 19 to the case body 13 is disposed between the gas passage membrane 19 and the case body 13 of the case 12.

After the gas passage membrane 19 is disposed on the inner side of the case main body 13 by the adhesive layer, the adhesive layer is cured so that the gas passage membrane 19 is firmly attached to the inner side of the case main body 13.

In the case where the gas passage membrane 19 is disposed on the inner side surface of the case main body 13, the formation direction of the through hole 14 formed in the case main body 13 is very important.

For example, when the through hole 14 is formed in the direction from the outer surface of the case body 13 toward the inner surface of the case body 13 by a method such as punching, the inner surface of the case body 13 is formed. The bulge may protrude sharp burrs.

When the burr protrudes from the inner surface of the case body 13, the gas passage membrane 19 formed with a very thin thickness is formed by a burr or torn by the bur, and at the same time gas is discharged into the gas passage membrane 19. The electrolyte of the cell assembly may leak out of the case 12.

Therefore, when the gas passage membrane 19 is disposed on the inner side of the case main body 13, the through-hole 14 is formed so that the burr protruding from the inner side of the case main body 13 does not occur. It is preferable to form in the direction toward the outer side from the inner side of 13).

3 to 7, a case puncturing apparatus of an energy storage device forming a through hole 14 in a direction from an inner side surface of the case body 13 to an outer surface of the case body 13 with reference to the drawings illustrated in FIGS. 3 to 7. Will be described.

3 is a plan view of a case perforation device of the energy storage device according to an embodiment of the present invention. Figure 4 is a perspective view of a case perforation device of the energy storage device according to an embodiment of the present invention. 5 is a perspective view illustrating the case fixing unit of FIG. 4.

1, 3 to 5, the case drilling apparatus 600 of the energy storage device includes a table body 100, a case transfer unit 200, and a drilling unit 300. In addition, the case drilling apparatus 600 recognizes the position of the case when forming the control unit 400 and the plurality of through holes in the case for controlling the case transfer unit 200 and the drilling unit 300 by an automated process. It may further include a sensor 500 for.

The table body 100 has a through hole 14 in the storage space in which the case transfer unit 200, the drilling unit 300, the control unit 400, and the sensor 500 are mounted, and the case body 13 shown in FIG. 1. Provides a work space for forming).

In one embodiment of the present invention, the table body 100 may be formed in various shapes and various sizes.

Referring to FIG. 4, the case transfer unit 200 serves to transfer the case body 13 in a direction toward the drilling unit 300.

The case transfer unit 200 includes a transfer unit 210 and a case fixing unit 250. When the at least two through holes 14 are formed in the case body 13, the case transfer unit 200 may further include a rotation motor 280.

The transfer unit 210 includes a pair of guide bars 220, a screw shaft 230 and a motor 240.

The guide bar 220 is formed, for example, in a rectangular bar shape, and the guide bar 320 is disposed with respect to the upper surface of the table body 100 with the side contacting the table body 100. . The guide bar 220 is disposed on the table body 100 with the pair spaced apart from each other.

A pivot plate 225 having a pivot portion is disposed at an end adjacent to the drilling unit 300 to be described later among the guide bars 320, and the pivot plate 225 is a screw shaft 230 and a pivot to be described later. Combined.

The screw shaft 230 is disposed between the guide bars 220, and the screw shaft 230 is formed in a direction parallel to the X axis defined in FIGS. 3 and 4.

Since the screw shaft 230 is formed in a direction parallel to the X axis, the screw shaft 230 and the guide bar 320 are disposed in parallel to each other.

One end of the screw shaft 230 is pivotally pivotally coupled to a pivot portion formed on the pivot plate 225.

The axis of rotation of the motor 240 is coupled to the other end opposite the one end of the screw shaft 230 pivotally coupled to the pivot plate 225. The motor 240 is capable of forward rotation or reverse rotation, whereby the screw shaft 230 is rotated forward or reverse by the motor 240.

In one embodiment of the present invention, the motor 240 is a BLDC (BrushLess DC) motor capable of forward or reverse rotation and can control the rotation angle of the screw shaft 230 very precisely according to an externally provided drive signal It is preferable to use etc.

The case fixing unit 250 of the case transfer unit 200 includes a fixing body 260 and an insertion unit 270.

The fixed body 260 is formed in a block shape, the lower surface of the fixed body 260 facing the screw shaft 230 is formed with a bushing portion 265 is formed with a screw portion is fastened to the screw shaft 230.

As the bushing part 265 of the fixing body 260 is fastened to the screw shaft 230 in a screw manner, the fixing body 260 is a punching unit which will be described later by the rotation direction of the screw shaft 230 by the motor 240. Advance in the direction close to 300 or backward in a direction away from the drilling unit 300 to be described later.

The insertion unit 270 is coupled to a portion of the fixing body 260 facing the drilling unit 300 to be described later. The outer circumferential surface of the insertion unit 270 is coupled to the inner circumferential surface of the case body 13 of the case 12 of FIG. 1, whereby a through hole 14 is formed in the case body 13 of the case body 13. Shake is prevented.

The insertion unit 270 may be made of a single part having a size corresponding to the diameter of the case body 13, but the insertion unit 270 may be combined with the case body 13 having various diameters. 270 may be manufactured by assembling at least three parts whose diameters of the parts fitted to the case body 13 are expanded or reduced.

In one embodiment of the present invention, the insertion unit 270 is fixed to the fixing body 260 when one through hole 14 is formed in the case body 13.

On the other hand, when the plurality of through holes 14 are formed in the case body 13, the rotation motor 280 is coupled to the fixed body 260, and the insertion unit 270 is coupled to the rotation shaft of the rotation motor 280. do.

The rotation motor 280 rotates the insertion unit 270 to which the case body 13 is coupled to the left or the right by a drive signal input from the outside.

The rotating motor 280 may be a BLDC motor suitable for rotating the case body 13 at a predetermined angle by a drive signal.

Referring to FIG. 5, a fixing plate 265 is disposed on an upper surface of the fixing body 260. One end of the tension spring 267 may be fixed to the fixing plate 265, and the other end opposite to the one end of the tension spring 267 is coupled to the insertion unit 270.

The tension spring 267 serves to return the insertion unit 270 rotated by the rotation motor 280 to a designated position.

When the plurality of through holes 14 are formed in the case body 13, the sensor 500 is disposed at the side of the case body 13 coupled to the insertion unit 270.

The sensor 500 senses the position and the rotation angle of the case body 13, and the sensor 500 generates a sensing signal related to the position of the case body 13.

As illustrated in FIG. 1, a plurality of through holes 14 may be formed in the case body 13 by the sensing signal generated from the sensor 500.

The puncturing unit 300 is disposed facing the case body 13 conveyed by the conveying unit 210 and the case fixing unit 250, and the puncturing unit 300 is shown in FIG. 1 on the case body 13. As it serves to form at least one through hole (14).

6 is a front view of the drilling unit shown in FIG. 4. FIG. 7 is a front view illustrating a through hole formed in the case body by the pin of FIG. 6.

1, 4, 6, and 7, the drilling unit 300 includes a holder 310, a pin 320, and a pin driver 330.

The holder 310 is formed in a shape similar to a metal rod, and the holder 310 is disposed on the inner side of the case body 13 in which the through hole 13 is to be formed, and the holder 310 is attached to the case transfer unit 200. It serves to fix the case body 13 transferred by not moving.

The pin 320 is disposed inside the holder 310, and the pin 320 is made of a material having a mechanical strength suitable to penetrate the case body 13 made of a metal material.

In an embodiment of the present invention, one pin 320 may be disposed in the holder 310, but a plurality of pins 320 may be disposed in the holder 310 according to the strength of the material of the case body 13. Can be.

The pin 320 coupled to the holder 310 is driven in conjunction with the operation of the pin driver 330 to be described later. For example, the pin 320 is disposed inside the holder 310 when the pin driver 330 is raised, and the outside of the holder 310 inside the holder 310 when the pin driver 330 is lowered. To protrude.

A through hole 14 is formed in the case body 13 by the pin 320 protruding from the holder 310 by the pin driving unit 330 descending.

The through hole 14 formed by the pin 320 has a diameter of 0.5 mm to 1.5 mm. When the diameter of the through hole 14 is about 0.5 mm or less, the diameter of the through hole 14 is too small so that the case body ( 13) because the gas generated from the inside is not smoothly discharged, and the through hole 14 has a diameter of about 1.5 mm or more, the gas passage membrane may be easily ruptured.

The pin driver 330 operates the pin 320 disposed in the holder 310.

The pin driver 330 includes a driver 332 and a fixing part 334.

The driving unit 332 is disposed on one side of the holder 310 around the holder 310, and the driving unit 332 is moved in a direction toward the holder 310 by hydraulic pressure or the like.

The fixing part 334 is disposed at the other side of the holder 310 around the holder 310, and the fixing part 334 is disposed facing the driving part 332, and supports the holder 310 and the driving part 332. It plays a role.

When the case body 13 is inserted into the holder 310, the driving unit 332 is driven in a direction toward the holder 310, and the pin 320 coupled to the holder 310 in conjunction with the driving unit 332 is The through hole 13 is formed in a direction from the inner surface of the case body 13 to the outer surface of the case body 13 while protruding from the holder 310.

Hereinafter, a process of forming a through hole in a direction from an inner side surface to an outer side surface of the case body will be described with reference to FIGS. 3 to 7.

First, the control unit 400 applies a drive signal to the motor 240 of the case transfer unit 200 to move the fixed body 260 backward and move the fixed body 260 to a designated position.

Subsequently, when the fixed body 260 is positioned at the designated position, the operator couples the case body 13 to the insertion unit 270 of the case transfer unit 200.

After the case body 13 is coupled to the insertion unit 270, the control unit 400 transfers the fixed unit 260 to the holder 310 of the drilling unit 300, and the transfer unit 210 of the case transfer unit 200. ) In the direction facing. At this time, the transport distance of the transport unit 210 is determined by the sensing signal associated with the position of the case body 13 input from the sensor 500.

The control unit 400 inserts the case body 13 coupled to the insertion unit 270 into the holder 310 of the drilling unit 300 according to the sensing signal input from the sensor 500.

After the case body 13 is disposed at the designated position of the holder 310, the control unit 500 applies a control signal to the drilling unit 300 to operate the drive unit 332 to operate the pin 320. .

The pin 320, which was disposed inside the holder 310 by the operation of the driving unit 332, protrudes to the outside of the holder 310, and thus, the case main body 13 fixed to the holder 310 may be attached to the case body 13. The through hole 14 is formed in the direction from the inside of the case 13 toward the outside of the case body 13.

When the plurality of through holes 14 are formed in the case main body 13, the control unit 500 applies a control signal to the rotation motor 280 of the case fixing unit 250 to angle the case main body 13 by a predetermined angle. A new through hole is formed next to the through hole which is first rotated by the drilling unit 300.

By repeating this process, the plurality of through holes 14 are arranged in a matrix form in the case body 13 as shown in FIG. 1.

After the through holes 14 are formed in the case main body 13, gas such as hydrogen generated inside the case main body 13 is discharged to the outside of the case main body 13 on the inner surface of the case main body 13 and the electrolyte solution. Of the gas passage membrane 19 is prevented from leaking.

As described in detail above, at least one through hole is formed by using an automated process in a direction from the inner surface of the case to the outer surface of the energy storage device to prevent burrs from being formed on the inner surface of the case. This prevents damage to the gas permeable membrane covering the through hole on the inner surface of the case.

On the other hand, the embodiments disclosed in the drawings are merely presented specific examples to aid understanding, and are not intended to limit the scope of the invention. It will be apparent to those skilled in the art that other modifications based on the technical idea of the present invention can be carried out in addition to the embodiments disclosed herein.

The present invention can be used in a system that requires a power supply, such as an electric vehicle, or a super capacitor, which is one of energy storage devices for a system for regulating or supplying an overload occurring instantaneously.

Claims

Table body;

A case transfer unit comprising a transfer unit disposed on the table body and a case fixing unit coupled to the transfer unit and fixed to the case; And

A holder disposed on an inner surface of the case, a pin installed in the holder and driven in a direction from the inner surface of the case toward an outer surface facing the inner surface to form a through hole in the case; Case drilling device of the energy storage device including a drilling unit comprising a pin drive for operating the.
The method of claim 1,

The transfer unit includes a screw shaft formed in the axial direction of the case and a motor for rotating the screw shaft,

The case fixing unit is a case drilling device of the energy storage device including a fixing body including a bushing portion fastened to the screw shaft and an insertion unit coupled to the fixing body and inserted into the inner peripheral surface of the case.
The method of claim 1,

And the case fixing unit includes a rotating motor for rotating the case.
The method of claim 3,

And a sensor for sensing a position of the case coupled to the case fixing unit and a rotation angle of the case by the rotary motor.
The method of claim 1,

And a control unit for controlling said case transfer unit and said puncturing unit.
The method of claim 1,

The diameter of the pin is 0.5mm to 1.5mm case perforation device of the energy storage device.
The method of claim 1,

The pin driving unit includes a driving unit disposed on one side of the holder and driven in a direction toward the holder and a fixing unit disposed on the other side of the holder,

And the pin protruding from the holder in association with driving of the driving unit to protrude in a direction from the inner side of the case toward the outer side.
The method of claim 1,

The through hole is a case drilling device of the energy storage device is arranged in a plurality of matrix form.